Finding the Fourth Proportional to 2,640.92, 3,952.78 and 1,947.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.92 : 3,952.78 = 1,947.32 : x
2. Step 2: Convert to fraction form
   2,640.92/3,952.78 = 1,947.32/x
3. Step 3: Cross multiply
   2,640.92x = 3,952.78 × 1,947.32
4. Step 4: Simplify right side
   2,640.92x = 7,697,327.55
5. Step 5: Solve for x
   x = 7,697,327.55/2,640.92
6. Step 6: Final answer
   x = 2,914.64